20066757 has 4 divisors (see below), whose sum is σ = 26755680. Its totient is φ = 13377836.

The previous prime is 20066731. The next prime is 20066771. The reversal of 20066757 is 75766002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20066757 - 2¹⁰ = 20065733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3344457 + ... + 3344462.

It is an arithmetic number, because the mean of its divisors is an integer number (6688920).

Almost surely, 2^20066757 is an apocalyptic number.

It is an amenable number.

20066757 is a deficient number, since it is larger than the sum of its proper divisors (6688923).

20066757 is an equidigital number, since it uses as much as digits as its factorization.

20066757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688922.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 20066757 is about 4479.5933967270. The cubic root of 20066757 is about 271.7434368872.

The spelling of 20066757 in words is "twenty million, sixty-six thousand, seven hundred fifty-seven".